Machine-controlling treadle



H.- .HUBBELL. MACHINE CONTROLLING TREADLE.

APPLICATION FILED SEPT-11%| I920.

1,4,09,00.0.- Patented Mar. 7, 1922.

3 SHEETSSI'IEET I INVENTOR ATTORNEYS II. HUBBELL.

IIIA-CHINE CONTROLLING TREADLE. I APPLICATION FILED SEPT. 13, I920.1,409,000, I Patented Mar. 7, 1922.

3 SHEETS-SHEET 2.

INVENTOR MM Wm ATTORNEYS H. HUBBELL.

MACHINE CONTROLLING TREADLE.

APPLICATION man SEPT. 13, 1920.

3 SHEETSSH EET 3- g g g INVENZOR I BY ATTORNEY Patented Mar. 7, 1922.

UNITED STATES PATENT QFFICE.

HARVEY HUBBELL, OF BRIDGEPOBT, CONNECTICUT.

MACHINE-CONTROLLING TREAIDLE.

Application filed September To all whom it may concern: Be it known thatI, 'Hiinvnv HUnBnLL, citizen of the United States, residing atBridgeport, county of Fa rlield, State of Connecticut, have invented anImprovement in Machine-Controlling 'lreadles, oi which the following isa specification.

This vinvention relates to a machine controlling treadlewhichisparticularly useful in connection with automatic tapping machinesof the general type of that disclosed in Letters Patent No. 576,404,granted to me on February 2, 1897. The machine illustrated and describedin said patent is provided with a tap, a work earrier'adapted to movework into the tap, and with means whereby the tap may be rotated inopposite directions so that it may enter the work and be withdrawntherefrom, said rotating means including a pair of loose pulleys whichare continuously rotatable on the tap carrying shaft, cone pulleys whichare keyed to said shaft and are adapted'to alternately engagehollow-cones carried by the loose pulleys, and a bell crank leveradaptedto cause the cone pulleys to move longitudinally of the shaft and intoand out of engagement with the hollowcones, said bell crank lever beingmanipulated by means of a treadle.

It is the object of the present invention to provide a controllingtreadle which shall be capable of causing the direction oi rotation of atap or drill in machines of the present character to be reversed, andwhich is so constructed and arranged that the rotating power for the tapor drill shaft is necessarily and automatically shut oil when theoperator leaves the machine. To this end, I preferably provideelectrical operating means and means associated therewith for causingsaid tap or drill to be alternately rotated in opposite directions, saidelectrical operating means and associated means being the equiv alent ofthe means for the same purpose disclosed in the patent above identified.end a. doubleacting tr adle for manipulating said associated means as insaid patent and for controlling said electrical operating means bycausing a circuit to be open when said treadle is in normal position andto be closed when said machine is in use. The advantage of having the.otating power for the tap or drill shalt automatically shut oil when theoperator leaves the machine will be apparent.

lVith the above other objects in view,

Specification of Letters Patent.

Patented Mar. '7, 1922.

13, 1920. Serial No. 409,973.

the invention will now be fully described and hereinafter specificallyclaimed.

In the accompanying drawing lormhw a part of this specification, a

F .l is a. perspective view of a complete machine disclosing thecontrolling treadle of the invention;

Fig. 2 a side elevation as viewed from the left in Fig. 1, showing thepedal and the pedal carrier in different positions;

Fig. 3 a partial side elevation correspond ing with Fig. 2, but showingthe pedal and the pedal carrier in dillerent positions;

Fig. 4.- a side elevation as viewed from the right in Fig. showing thepedal and pedal carrier as in i 1g. 2;

Fig. 5 a partial side elevation corresponding with Fig. 3;

6 a top plan view;

Fig. 7 a sectional view on line 77 in Fig. 2, loosing in the directionof the arrows; L

Fig. 8 is a partial side elevational view oi the lower part oi thepedestal and connected parts, showing the treadle and the connectedlink.

Fig. 9 is a front elevational view of the machine showing belt-drive andcontrol theretor.

l denotes a pedestal base. and 11 a table supported thereby. spindleshaft 12. journaled in bearings 13 supported from the table, is providedwith a chuck l4 and with a tap or drill 15. The spindle shaft isrotatable and longitudinally slidable in its bearings and rigidlycarries beveled wheels 16 which are located hetween said bearings andare spaced from each other a suitable distance. The beveled wheels serveas driving pulleys for the spindle shaft and are provided with frictionfacings for this purpose. An electric motor 17 preferably resting on thetable is provided with a motor shaft 18. A driving shaft 19, flexiblyconnected to the motor shaft as indicated at 20. is provided with abeveled wheel 2i. similar to beveled wheels 16. which is adapted toalternately engage said last mentioned beveled wheels when the spindleshaft is reciprocatcd as presently to he described. md to thus impartrotation in opposite directions to the spindle shattas will beunderstood. denotes a bearing bracket For the driving shaft. As shown inFig. 7. 23 denotes lead wires. 2 a switch base carrying a lead wire plugfuses 26. knife blade I blade contacts and are movableinto and.

contacts 27, and switch blades 28. The switch blades are pivoted tocertain of the out of others,and wires (not shown) lead from the bladecontacts to the motor. An insulated tie bar 29 secured to the switchblades carries an angle strip 30 which is pivoted, as indicated at 31,to a pedal linkv consisting of a flat bar 32 and a round rod 33 which ismanipulable to open and close the circuit by means of the pedal carrierof the treadle as will be made clear. The pedal link is made in twoparts as shown so that the upward movement of the trea'dle will beyieldingly imparted to the knife blades. The fiat bar is provided withears,

'41 on the table and passing through an opening 42 in the table carriesa yoke rod 43 which has a bearing surface loosely fitting the spindleshaft. A pair of yoke collars 44 fixed on. the spindle shaft are locatedat opposite sidesof the bearing surface of the yoke rod. A slide rod 45located in a work rest 46 and adapted to move from and toward the tap ordrill, is provided with a work holder 47 and with an adjustable collar48 carrying a short dependingrod 49 adapted to engage a tripping pin 50carried by a trip lever 51 pivoted to the table as indicated at 52. Thetrip lever is provided with an arcuate slot 53 in which the tripping pinis adjustable, said pin being provided with a shoulder and-a wing nut 54for this purpose. A link 55, pivoted to the trip leveras indicated at'56, is pivoted to the fiat bar, denoted by 57 of a second 1 pedallink.A catch 58 carried by flat bar 57 is adapted to engage a catch plate 81car ried by the bell crank lever. A relatively strong spring- 59,secured to the bell crank lever and to the table, holds the dependingarm of the bellcrank lever in its uppermost posi tion, and a relativelyweak spring 60 secured to fiat bar 57 and to the bell crank levernormally holds the catch in engagement with the catch plate. Thedepending arm of the bell crank lever is adapted to be 'moved downwardlyby means of the second pedal 'link consisting of flat bar 57 and a rod61 and manipulated by means of. the treadle of the invention as willalso be made clear. The pedal link is made in two parts as before notedso that the downward movement of the treadle will be yieldingly impartedto the depending arm of the bell crank lever, fiat bar 57 being providedwith ears 62 and 63 through which rod 61 is adapted to slide, the rodcarrying a spring 64 and collars 65 and 66. The spring is locatedbetween collar 65 and car 63, and collars 65 and 66 are below cars 62and 63, respectively. 7

' The treadle of'the invention consists of a pedal carrier 84 and apedal 83. The pedal carrier has a long arm 67, a short arm 68 and a tierod 69. which connects the front ends of said arms with each other. Arod 7 O passing through the pedestal base forms a pivot for both arms,the short arm being pivoted on said rod at its rear end and the long armbeing pivoted intermediate its ends, as will be obvious. 1A weight-71adjustable longitudinally on the rear portion of the long arm is for thepurpose of normally keeping said end in its lowermost position. Thepedal is provided with ears 72 which are pivoted to opposite ends of thetie rod, with an ear 73 adapted to hold a spring 74, the opposite end ofwhich is attached to the pedestal base, as indicated at 75, to normallyhold the pedal in elevated position, and with an car 76 carrying a stud77. The lower end vided with a similar eye 78, adapted to piv otallyreceive a stud 79 extending from the long arm of the pedal carrier andlocated between the pivot point for saidlong arm and the adjustableweight. Lugs 80'on the short and'long arms of the pedal carrier limitthe downward movement of the pedal.

It will be obvious that when the pedal carrier is in the positiondisclosed in Figs. 2 and 4, the circuit will be broken and the rotatingpower for the driving shaft will be shut off. 'When now the operatorpushes downwardly on the front portion of the pedal carrier the knifeblades will move into the blade contacts and the motor will cause thedriving shaft and'its beveled wheel to rotate. Spring 59 will normallyhold the depending arm of the bell crank lever in its uppermost positionso that'th'e' yoke rod will cause one of beveled wheels 16 (the one tothe right in Figs. 4 and 6). to engage the beveledflwheel of the drivingshaft as will be understood 'lVhen the operator pushes downwardly on therear portion of the pedal the catch, by reason-of its engagement withthe catch plate, will cause the'fd'epending arm of the bellcrank lever.to be lowered so that the other bev'eledwheel 16 (the oneto the left inFigs. 4 and 6) engages the bev-' eled wheel of the driving shaft. It iswhen trip lever and the collar carrying the short depending rod 49 is soadjusted that at the end of the tapping or drilling operation the rod-19 causes the trip lever, by means of the link, to move the catch 58,from the catch plate 81, as will be understood; spring 59 being allowedto act to draw the depending arm of the bell crank lever to itsuppermost position, so that the beveled wheel to the right in Figs. atand 6 again engages the beveled wheelof the driving shaft. This is theposition of the operating parts when the tap or drill is being withdrawnfrom the work. \Vhen now the operator releases the pedal, spring 74-will cause said pedal to be elevated and spring 60 will 'draw the catchover so that it engages the catch plate on the bell crank lever, andthrows the trip lever 51 back to normal position. Another piece of workcan now be tapped or drilled as before. It will be evident that as soonas the operator releases the front portion of the pedal carrier, theweight will fall by gravity and cause the knife blades to be removedfrom the blade contacts to break the circuit.

In order to adapt this invention to factories in which motor drives Farenot installed there have been. substituted for the motor 17, a belt 87,and fast and loose pulleys S8 and 89 on the spindle shaft 12.

Belt guide pins 90 upon each side of the belt are held upon a bell crankshifting lever 91 pivoted at 92 upon a bracket 93 forming a part of thebearing 13 for the spindle shaft 12. By means of the spring 94 the beltshifting lever is retained in the position shown, with the belt on theloose pulley 89. A link 95 pivotally connected to the lower end of thebelt shifting lever extends downwardly to a pivot pin 96 passing throughthe flanged over portion 97 of the inner end of the long arm 67 of thepedal carrier.

It will be plain that the depression of the pedal carrier initiates thedriving action by moving the belt onto the fast pulley and that by themanipulation of the pedal the direction of drive of the spindle shaftwill be controlled as described, upon release of the pedal carrier thespring 94: will shift the belt onto the loose pulley and stop the drive.

hat I claim is:

1. A machine controlling mechanism comprising main and auxiliary powercontrolling means, a treadle comprising a pedal and a pedal carrierpivoted to each other, with one of them fulcrumed on a suitable support,whereby they may be swung on the support as a unit or one may beoperated independently of the other, and connecting means wherebyoperation of said members as a unit will actuate said main powercontrolling means and actuation of said independently operable memberwill actuate said auxiliary power controlling means.

2. In a device of the class described, a rotatable shaft, primary andsecondary controlling means for said shaft so arranged that the primarycontrolling means is independent of the secondary but the secondary isdependent on the primary, a pivotally mounted pedal carrier connected tosaid primary controlling means, a pedal pivoted to said pedal carrierand connected with said secondary controlling means, and means normallytending to hold said pedal and carrier in ineffective position.

A machine controlling mechanism comprising a main [power controllingmeans and an auxiliary power controlling means, manually operable meanscomprising two sections one of which is fulcrumed on a suitable supportand the other fulcrumed on the first section, whereby the two sectionsmay be operated as a unit or the second section may be independentlyoperated on the first section, and means whereby operation of saidsections as a unit will actuate said main power controlling means andoperation of the second section will actuate said auxiliary powercontrolling means.

4. A machine controlling treadle comprising a pedal carrier consistingof a long arm, a short arm, and a tie rod between said arms, a pedalpivoted to said tie rod, and means for pivotally supporting said pedalcarrier.

A machine controlling treadle comprising a pedal carrier consisting of along arm, a short arm, and a tie rod between said arms, a pedal pivotedto said tie rod, and means for pivotally supporting said pedal carrier,said pivoting means consisting of a rod passing through a pedestal baseand engaging said long arm and short arm.

6. A machine cont-rolling treadle comprising a pedal carrier consistingof a long arm, a short arm, and a tie rod between said arms, means forpivotally supporting said pedal carrier, said means comprising a rodpassing through said short arm at its rear end and through said long armintermediate its ends. a. second tie rod connecting said arms at theirfront ends and a pedal pivoted to said second tie rod.

7. A machine controlling treadle comprising a pedal carrier consistingof a long arm, a short arm, and a tie rod between said arms, a pedalpivoted to said tie rod, a rod to which said pedal carrier is pivoted,said rod entering said long arm intermediate its ends and said short armat its rear end, means for normally holding said pedal carrier inelevated position, and additional means for normally holding said pedalaway from said pedal carrier.

8. A machine controlling treadle comprising a pedal carrier and a pedal,said pedal carrier consisting of a long arm carrying a weight near itsrear end, a short arm, and a tie rod connecting said arms at their frontends, and'said pedal being pivotally secured to said tie rod, incombination with means for pivotally supporting said pedal carrier, saidsupporting means comprising a rod passing through a pedestal base andengaging said long arm intermediate its ends and said short arm at itsrear end.

9. A machine controlling treadle comprising a pedal carrier consistingof a long arm, a short arm, and a tie rod between the front ends of saidarms, a pedal pivoted to said tie rod, a rod pivotally supporting saidpedal carrier, said'rod entering said long arm intermediate its ends andentering said short arm at its rear end, a weight arranged on the rearend of the long arm for normally holding the pedal carrier in elevatedposition,

I and means for normally holding the pedal in elevated position and awayfromthe pedal carrier.

;1'0. A machine controlling treadle comprising a pedal carrierconsisting of a long arm, a short arm, and a tie rod between the frontends of said arms, a pedal pivoted to said tie rod, a rod pivotallysupporting said pedal carrier, said rod entering said long armintermediate its ends and entering said short arm at its rear end, aweight arranged on the rear end of the long arm for normally holding thepedal carrier in elevated position, and a spring attached to the rearportion of the pedaland to a pedestal base for normally holding thepedal in elevated position. 7

11. A machine controlling treadle comprising a pedal carrierconsistingof a long arm; ashort arm, and a tie rod between the frontends of said arms, a pedal pivoted to said tie rod, means pivotallysupporting said pedal, said supporting means entering said long armintermediate its ends and entering said short arm at its rear end, meansarranged on the rear end of the long arm for normally holding the pedalcarrler 1n elevated position, means between the rear portion of thepedal and a pedestal base for normally holding the pedal in elevatedposition,

and lugs carried by saidlong and short arms for limiting the downwardmovement of the pedal.

.12. A machine controlling treadle com prising a pedal carrierconsisting of a long arm, a short arm, and a tie rod between the frontends of said arms, a pedal pivoted to said tie rod, means pivotallysupportingsaid pedal carrier, said supporting means. 'enter ing saidlong arm intermediate its ends and entering said short arm at its rearend, means arranged on the rear end of the'long arm for normally holdingthe pedal carrier in elevated position, means for normallyholding thepedal in elevated position and away fromthe pedal carrier, and studscar.- ried by said long arm and pedal respectively,-saidstud carried bysaid long arm bescribed.

13. A machine controlling treadle comprising a pedal carrier consistingof a long arm, a short arm, and a tie rod between the front ends of saidarms, a pedal pivotedto said tie rod and provided at its rear end withmeans to normally hold it in elevated position, and means for normallyholding the front portion of the pedal carrier. in elevated position, incombination with .pedal links and means for pivot-ally connecting saidpedal links to said long arm and-pedal, respectively, said pivotalconnecting means for said long arm and pedal being adjacent the rearends of the same as and for the purposes described. A i

14. A machine controlling. treadle comprising a pedal carrier consistingof a long arm, a short arm, a tie rod between the front ends of saidarms, andmeans for pivotally supporting said pedal carrier, said pivotalsupporting means entering said long arm intermediate its ends andentering said short arm at. its rear end, a, pedal pivoted to said.

tie rod andprovided at its rear end with means to normally hold it inelevated position, and a weight secured'to the rear'portion of said longarm for normally holding the pedal-carrier in elevated position, in combination with pedal links and means for pivotally securing said pedallinks to said long arm and'pedal, respectively, said pivotal securingmeans for said long arm being arranged between said pivotal supportingmeans and said weight, and said pivotal securing means for saidpedal-being attached 7 to the rear portion of said pedal, as andufor'the purposes described. 7 15A machinecontrolling treadle comprising apedal carrier and. apedal, said pedal carrier consisting ofa longarlmashort arm, a tie rod between the front ends of said arms, andmeans forpivotally supporting said pedal carrier, said'pivotal supporting meansengagingthe rear end of the short arm and engaging the long armintermediate its ends, and said pedal pivoted to said tie rod, .incombination with a weight carried near the rear end of said long arm fornormally holding said pedal carrier in elevated position, meansconsisting of a spring attached to the rear portion of said pedal and toa pedestal base fo'r'normally holding said pedal in elevated position,pedal links actuated by said pedal carrier and pedal, respectively, andmeans for pivotally securing said pedal links to said pedal and pedalcarrier, said pivotal securing means between one of said pedal links andthe pedal carrier engaging said long arm at a point between its pivotalsupport and its weight, and said pivotal securing means for the other ofsaid pedal links being arranged on the rear portion of the pedal.

16. A machine controlling treadle comprising a pivotally mounted pedalcarrier and a pedal pivoted to the pedal carrier, in combination withpedal links and means for pivotally securing said pedal links,respectively, to the pedal and pedal carrier, said pivotal securingmeans being arranged aqjacent the rear portions of the pedal and pedalcarrier, and said pedal links being capable of actuation by pedal andcarrier, one of said pedal links attached to means for opening andclosing a circuit and the other of said pedal links attached tomechanism capable of causing the direction of rotation of a shaft to bereversed.

17. A machine controlling treadle comprising a pedal carrier and apedal, in combination with pedal links and means for pivotally securingsaid pedal links, respectively, to said pedal and pedal carrier. saidpedal carrier consisting of a long arm, a short arm, a tie rod betweenthe front ends of said arms, and means for pivotally supporting saidpedal carrier, said pivotal supporting means engaging said long armintermediate its ends, and said pedal provided with ears adapted to bepivoted on said tie rod, in combination with a weight carried by therear end of said long arm' for normally holding the front portion ofsaid pedal carrier in elevated position, means for normally holding saidpedal in elevated position and pedal links pivotally secured,respectively, to said long arm at a point between said weight andpivotal supporting means and to said pedal at its rear portion, one ofsaid pedal links having its opposite end attached to means for openingand closing a circuit and the other of said pedal links having itsopposite end provided with a catch adapted to be engaged by a bell cranklever and pivoted to means whereby said catch can be disengaged fromsaid lever.

18. A machine controlling mechanism comprising main and auxiliary powercontrolling means, a treadle comprising a pivotally mounted pedalcarrier and a pedal pivoted to said carrier, and means connecting thepedal carrier and pedal with the main and auxiliary power controllingmeans, respectively, the pivots for the pedal and pedal carrier being soarranged that depression of the pivotal connection between the twomembers will close the main power controlling means and operation of thepedal about its pivot will control the auxiliary power controllingmeans.

19. A machine controlling mechanism comprising main and auxiliary powercontrolling means, a treadle comprising a pedal carrier pivotallymounted rearwardly of the forward edge thereof and a pedal pivoted tovthe carrier forwardly of the first mentioned pivot, and meansconnecting the pedal carrier and the pedal with the main and auxiliarypower controlling means respectively, said means being so arranged thatdepression of the forward edge of the treadle carrier will close saidmain power controlling means and operation of the pedal about its pivotwill control the auxiliary power controlling means.

In testimony whereof I afiix my signature.

HARVEY HUBBELL.

